from Wiktionary, Creative Commons Attribution/Share-Alike License

n. The plea or mode of defense under which a person on trial for a crime proves or attempts to prove that he was in another place when the alleged act was committed; as, to set up an alibi; to prove an alibi

v. to provide an alibi for

v. to provide an excuse for

from the GNU version of the Collaborative International Dictionary of English

n. The plea or mode of defense under which a person on trial for a crime proves or attempts to prove that he was in another place when the alleged act was committed

from The Century Dictionary and Cyclopedia

In law, elsewhere; at another place.

n. In law, a plea of having been elsewhere at the time an offense is alleged to have been committed.

n. The fact or state of having been elsewhere at the time specified: as, he attempted to prove an alibi.

n. (law) a defense by an accused person purporting to show that he or she could not have committed the crime in question

n. a defense of some offensive behavior or some failure to keep a promise etc.

Etymologies

Latin, elsewhere, from alius, other (on the model of ibi, there); see al-1 in Indo-European roots.

(American Heritage® Dictionary of the English Language, Fourth Edition)

Latin alibi ("elsewhere, at another place"). (Wiktionary)

Examples

And you know, when we ` re talking about his story, that ` s one of the things that ` s really captured, I think, the attention of people around here is it ` s so absurd that somebody ` s-- if you want to use the term alibi, would be that they left their pregnant wife by the side of the road.